When Louisiana Democrat Sen. Mary Landrieu lost her re-election runoff on Saturday it put Barack Obama in the record books as the two-term president with the most midterm losses for his party. The record previously was held by Harry Truman. Truman’s Democratic Party lost 74 seats in 1946 and 1950, while under Obama the Democrats have lost a total of 75 seats in 2010 and 2014. He could lose one more if Republican Martha McSally beats Democratic Rep. Ron Barber in Arizona in an election recount, Breitbart News reports. McSally is currently ahead by only 200 votes. …